Permanent magnet synchronous motor passive control driving system based on MMC-PET

The invention relates to a permanent magnet synchronous motor passive control driving system based on MMC-PET. The system adopts a three-stage structure of an input stage, an intermediate stage and an output stage to supply power to a passive network. The three-phase alternating current is rectified by the input-stage high-voltage current through a modular multilevel converter MMC. The intermediate stage adopts a series input and parallel output dual-active bridge type converter to carry out isolation and voltage reduction on the direct current output by the input stage. The output stage adopts a three-phase full-bridge inverter, and the output of the three-phase full-bridge inverter is connected with a permanent magnet synchronous motor. The three-stage MMC-PET system is suitable for high-voltage and high-power occasions while completing basic voltage conversion, the application range is wider, and application prospects can be provided for higher-voltage occasions by combining the three-stage MMC-PET system